Interesting one today for me. Playing a round and on the 3rd hole, there was a stone underneath my ball. Large enough to not move with contact but wasn't visible when standing over the ball. It's damaged my 50degree, I would say, badly but the course pro basically said it's tough luck. For context, this was my first time playing the course, there were no rocks visible in the surrounding areas and nor was I in a hazard/bunker. It wasn't rough just off the fairway. The pro did like to mention that after the fact that members sometimes poke and prod the ground around the ball to see if there is a stone and take relief if so but didn't want to mention that prior to the round. Thoughts?